Waist support adjusting mechanism for seat, waist support and seat

Abstract

The utility model discloses a waist support adjusting mechanism for a seat, a waist support and the seat, and the waist support adjusting mechanism comprises a mounting seat, a waist support adjusting mechanism and a waist support adjusting mechanism, the waist support driving mechanism is arranged on the mounting seat; the movable seat is used for being fixedly connected with the waist support; wherein the waist support driving mechanism comprises a waist support driving motor and a lead screw nut transmission mechanism, and the waist support driving motor is connected with the movable seat through the lead screw nut transmission mechanism and drives the movable seat to move in a reciprocating mode in the set direction. According to the application, the moving distance of the movable seat can be accurately controlled by accurately controlling the number of turns of rotation of the driving motor, and the movable seat can stay at any position on the moving stroke. In this way, a user can accurately adjust the waist support to the expected position according to needs of the user.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, and in particular to a lumbar support adjustment mechanism for a seat, a lumbar support and a seat. Background Art

[0002] In order to improve user comfort, a lumbar support is provided on the back of the seat in the related art. A common solution is to fix the lumbar support on the back of the seat. Since the position of the lumbar support cannot be adjusted, it is difficult for users to find a more comfortable posture when using such seats. There are also some solutions in which the lumbar support can be adjusted relative to the seat, but it is generally set to manual gear adjustment. It has multiple gears and requires multiple manual adjustments, which is less convenient to use. In addition, since the position of the lumbar support in each gear is fixed, the positions of the lumbar support in two adjacent gears are separated by a certain distance, which makes it difficult to adjust the lumbar support to the best state for supporting the waist. Utility Model Content

[0003] The utility model aims to provide a lumbar support adjustment mechanism, a lumbar support and a seat for a seat, which can facilitate a user to adjust the lumbar support position according to his / her own needs.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] Lumbar support adjustment mechanism for a seat, comprising:

[0006] A mounting seat, which is used to connect with the backrest of the seat;

[0007] a lumbar support driving mechanism, which is disposed on the mounting seat; and

[0008] A movable seat, which is used to be fixedly connected to the waist support;

[0009] Wherein, the lumbar support driving mechanism includes a lumbar support driving motor and a screw-nut transmission mechanism, and the lumbar support driving motor is connected to the movable seat through the screw-nut transmission mechanism and drives the movable seat to reciprocate along a set direction.

[0010] Preferably, the screw-nut transmission mechanism includes a transmission screw, a nut sleeve and a connecting tube, the transmission screw is connected to the output shaft of the lumbar support driving motor and is driven to rotate by the lumbar support driving motor, the nut sleeve is sleeved on the outside of the transmission screw and the two are threadedly matched; the connecting tube is sleeved on the outside of the nut sleeve and the two are fixedly connected, the connecting tube is configured to be able to cooperate with an external structure to limit the rotation of the nut sleeve, and the connecting tube is connected to the movable seat.

[0011] Preferably, the lumbar support driving motor is arranged perpendicular to the set direction, the output shaft of the lumbar support driving motor is fixedly provided with a driving bevel gear, the transmission screw is fixedly provided with a transmission bevel gear, and the driving bevel gear is meshed with the transmission bevel gear for transmission.

[0012] Preferably, the connecting tube and the movable seat are movably connected via a connecting shaft that runs through the two in a horizontal direction, and the axial direction of the connecting shaft is perpendicular to the set direction; the lumbar support adjustment mechanism also includes an elastic member arranged between the connecting tube and the movable seat, and two ends of the elastic member respectively apply pressure to the connecting tube and the movable seat.

[0013] Preferably, the connecting tube forms a first mounting groove, the movable seat forms a second mounting groove, the elastic member is a compression spring, the two ends of the compression spring are respectively placed in the first mounting groove and the second mounting groove, and the two ends of the compression spring respectively abut and press against the bottom wall of the first mounting groove and the bottom wall of the second mounting groove.

[0014] In addition, to achieve the above purpose, the utility model also adopts the following technical solutions:

[0015] A lumbar support comprises a lumbar support body and a lumbar support adjustment mechanism as described in any one of the above technical solutions, wherein the lumbar support adjustment mechanism is connected to the lumbar support body via a movable seat.

[0016] Preferably, the lumbar support body is formed with a concave cavity, and the lumbar support body is provided with a through hole on the bottom wall of the concave cavity, the movable seat is located in the concave cavity and fixedly arranged on the bottom wall of the concave cavity, the mounting seat is located at the rear of the lumbar support body and outside the concave cavity, and the lumbar support driving mechanism is connected with the movable seat through the through hole.

[0017] Preferably, the lumbar support further includes: an elastic cover body, which is arranged on the lumbar support body and cooperates with the concave cavity to form a mounting cavity; a massage assembly, which is arranged in the mounting cavity and has an extended position and a retracted position relative to the lumbar support body; a massage assembly drive mechanism, which is arranged in the mounting cavity and connected to the massage assembly; and a controller, which is connected to the massage assembly drive mechanism and is used to control the massage assembly drive mechanism to drive the massage assembly to switch between the extended position and the retracted position; wherein, when the massage assembly is in the extended position, it pushes on the elastic cover body, and when the massage assembly is in the retracted position, there is a gap between the elastic cover body and the massage assembly.

[0018] Preferably, the lumbar support further comprises a sliding seat arranged in the mounting cavity, the sliding seat is slidably arranged on the movable seat, and the massage assembly is fixedly arranged on the sliding seat.

[0019] Preferably, the massage assembly drive mechanism includes a massage assembly drive motor and a connecting block fixedly arranged on the lumbar support body, the output shaft of the massage assembly drive motor is provided with a threaded screw segment, the connecting block is provided with an internal thread matched with the threaded screw segment, the threaded screw segment is inserted into the connecting block and the two are threadedly matched, and the body of the massage assembly drive motor is fixedly arranged on the slide seat.

[0020] Preferably, the lumbar support also includes a detection element arranged in the installation cavity, the controller is connected to the detection element and obtains the position information of the massage assembly through the detection element, and the controller controls the massage assembly drive motor to operate through the position information to drive the massage assembly to switch from the retracted position to the extended position.

[0021] In addition, to achieve the above purpose, the utility model also adopts the following technical solutions:

[0022] A seat, wherein the seat comprises a lumbar support adjustment mechanism as described in any one of the above technical solutions; or, the seat comprises a lumbar support as described in any one of the above technical solutions.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The lumbar support driving mechanism is set to drive the movable seat to move, and then the movable seat drives the lumbar support fixedly connected to the movable seat to move synchronously, so as to adjust the position of the lumbar support. Since the movable seat is driven by a screw nut transmission mechanism, the moving distance of the movable seat can be accurately controlled by accurately controlling the number of rotations of the lumbar support driving motor, and the movable seat can stop at any position on the moving stroke. In this way, the user can accurately adjust the lumbar support to the desired position according to their own needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a lumbar support adjustment mechanism for a seat provided in an embodiment of the present application;

[0026] Figure 2 is an exploded view of the lumbar support adjustment mechanism;

[0027] Figure 3 is a cross-sectional view of the lumbar support adjustment mechanism;

[0028] Figure 4 is a structural schematic diagram of a lumbar support using the lumbar support adjustment mechanism;

[0029] Figure 5 is a schematic diagram of another viewing angle of a lumbar support with the lumbar support adjustment mechanism;

[0030] Figure 6 The exploded view of the lumbar support is shown in FIG.

[0031] Figure 7 is a cross-sectional view of the lumbar support excluding the lumbar support body;

[0032] Figure 8 for Figure 7 A magnified schematic diagram of part A;

[0033] Fig. 9 is a partial cross-sectional view of the lumbar support when the massage assembly is in a retracted position;

[0034] Fig.10 for Fig. 9 A magnified schematic diagram of part B;

[0035] Fig.11 is a partial cross-sectional view of the lumbar support when the massage assembly is in the extended position;

[0036] Fig.12 for Fig.11 A magnified schematic diagram of part C;

[0037] Fig.13 The figure is a schematic diagram of installing the lumbar support provided by the present embodiment on the backrest of a seat.

[0038] Among them, 1, mounting seat; 10, main housing; 100, first positioning groove; 11, mounting plate; 2, waist support driving mechanism; 20, waist support driving motor; 21, transmission screw; 22, nut sleeve; 23, connecting tube; 230, first mounting groove; 231, connecting hole; 24, connecting frame; 240, first circuit board; 3, movable seat; 30, second mounting groove; 31, slide groove; 32, guide slide rail; 320, second circuit board; 4 , elastic part; 5, lumbar support body; 50, concave cavity; 51, perforation; 6, massage assembly; 60, shell; 61, snap-on section; 62, massage head; 7, massage assembly drive mechanism; 70, massage assembly drive motor; 700, threaded screw section; 71, connecting block; 710, threaded sleeve; 8, sliding seat; 80, main seat; 800, sliding block part; 801, second positioning groove; 81, cover; 810, third positioning groove; 9, chair back. DETAILED DESCRIPTION

[0039] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] This embodiment provides a lumbar support adjustment mechanism for a seat, which can adjust the position of the lumbar support provided on the seat. Figure 1 , Figure 2 and Figure 3 As shown in FIG. , the lumbar support adjustment mechanism includes a mounting seat 1, a lumbar support driving mechanism 2 and a movable seat 3. Fig.13 As shown in FIG. 1 , the mounting seat 1 is used to connect with the backrest 9 of the seat, combined with Figure 4 As shown in , the movable seat 3 is used to be fixedly connected with the lumbar support. That is, when the lumbar support adjustment mechanism is applied, the mounting seat 1 is mounted to the seat back 9 of the seat, and the movable seat 3 is mounted to the lumbar support of the seat. The lumbar support driving mechanism 2 in this embodiment is arranged on the mounting seat 1, and the lumbar support driving mechanism 2 includes a lumbar support driving motor 20 and a screw nut transmission mechanism. The lumbar support driving motor 20 is connected to the movable seat 3 through the screw nut transmission mechanism and drives the movable seat 3 to reciprocate along the set direction.

[0043] The lumbar support driving mechanism 2 is provided to drive the movable seat 3 to move, and then the lumbar support fixedly connected to the movable seat 3 is driven to move synchronously through the movable seat 3, so as to adjust the position of the lumbar support. Since the movable seat 3 is driven to move by the screw nut transmission mechanism, the moving distance of the movable seat 3 can be accurately controlled by accurately controlling the number of rotations of the lumbar support driving motor 20, and the movable seat 3 can stay at any position on the moving stroke. In this way, the user can accurately adjust the lumbar support to the desired position according to his or her own needs.

[0044] Specifically, Figure 2 and Figure 3As shown in the figure, the mounting base 1 in this embodiment includes a main housing 10 and a mounting plate 11 disposed on the main housing 10. The main housing 10 includes two half shells fixedly mounted together. After the two half shells are assembled, a first positioning groove 100 is formed between the two (i.e., inside the main housing 10). The lumbar support driving motor 20 in the lumbar support driving mechanism 2 is positioned in the first positioning groove 100. The mounting plate 11 is used to be mounted with the chair back 9. The mounting plate 11 can be fixedly mounted on the chair back 9 or can be adjusted to be raised and lowered on the chair back 9. The details will not be repeated here.

[0045] The screw-nut transmission mechanism in this embodiment includes a transmission screw 21, a nut sleeve 22 and a connecting tube 23. The transmission screw 21 is connected to the output shaft of the lumbar support driving motor 20 and is driven to rotate by the lumbar support driving motor 20. The nut sleeve 22 is sleeved outside the transmission screw 21 and the two are threadedly matched. The connecting tube 23 is sleeved outside the nut sleeve 22 and the two are fixedly connected. The connecting tube 23 is configured to be able to cooperate with the external structure to limit the rotation of the nut sleeve 22, and the connecting tube 23 is connected to the movable seat 3. Through the above arrangement, when the lumbar support driving motor 20 is working, the transmission screw 21 can be driven to rotate. Since the nut sleeve 22 is restricted and cannot rotate, the nut sleeve 22 moves back and forth along its axial direction under the drive of the threaded transmission. It is easy to understand that the set direction is the axial direction of the transmission screw 21 or the nut sleeve 22.

[0046] like Figure 3 As shown in the figure, in this embodiment, the lumbar support driving motor 20 is arranged perpendicular to the set direction, the output shaft of the lumbar support driving motor 20 is fixedly provided with a driving bevel gear, the transmission screw 21 is fixedly provided with a transmission bevel gear, and the driving bevel gear and the transmission bevel gear are meshed and transmitted. Through the above arrangement, the length direction of the lumbar support driving motor 20 can be arranged perpendicular to the set direction, which can reduce the space occupied by the lumbar support driving motor 20 along the set direction. Fig.13 As shown in , if the distance between the lumbar support and the chair back 9 along the set direction is too large, for the user, when the lumbar support is against the waist, the user's back may not be able to lean on the chair back 9 normally, reducing the user's comfort. Therefore, through the above-mentioned arrangement and setting method of the lumbar support drive motor 20, the space occupied by the lumbar support drive motor 20 along the set direction can be reduced, so that the distance value between the lumbar support and the chair back 9 can meet the design requirements. On this basis, the lumbar support drive motor 20 can also choose a motor with slightly higher power to obtain greater power. Through the cooperation of the active bevel gear and the transmission bevel gear, on the one hand, the transmission steering can be realized, and on the other hand, the transmission torque can be increased through the transmission ratio design.

[0047] When a user sits on a chair, it is not possible to maintain a fixed posture for a long time. If the lumbar support is rigidly connected to the connecting tube 23, the fixed lumbar support will make the user feel uncomfortable when the posture changes. For example, if the lumbar support can fit the user's waist when the user is in an upright sitting position, then when the lumbar support is rigidly connected to the connecting tube 23, it will be difficult for the lumbar support to fit the user's waist when the user changes to a leaning back posture. In this embodiment, the lumbar support has a certain degree of freedom of movement relative to the connecting tube 23, and the purpose of the lumbar support moving back and forth driven by the connecting tube 23 can still be achieved. Specifically, in combination with Figure 2 and Figure 3 As shown in the figure, the connecting tube 23 and the movable seat 3 in this embodiment are movably connected by a connecting shaft body that runs through the two in the horizontal direction, and the axial direction of the connecting shaft body is perpendicular to the set direction. Through the above arrangement, the movable seat 3 and the waist support fixedly mounted on the movable seat 3 can swing relative to the connecting tube 23 around the set axis of the connecting shaft body. In this way, when the user changes his posture, the waist support can swing adaptively so as to always fit the user's waist, thereby improving the comfort of use.

[0048] Specifically in this embodiment, a connection hole 231 is provided on the connection tube 23 and the movable seat 3, and the connection shaft passes through the connection hole 231. The connection shaft is a screw or nail, and its diameter is slightly smaller than the inner diameter of the connection hole 231.

[0049] Of course, if the movable seat 3 and the lumbar support fixedly mounted therewith are movable relative to the connecting tube 23 under normal conditions, the supporting effect of the lumbar support on the user's waist will be reduced. Therefore, when the above-mentioned scheme of setting the connecting shaft is adopted, it is also necessary to set an elastic member 4 between the connecting tube 23 and the movable seat 3, and the two ends of the elastic member 4 apply pressure to the connecting tube 23 and the movable seat 3 respectively. In this way, through the pressure of the elastic member 4, the movable seat 3 and the lumbar support fixedly mounted therewith can be kept stable relative to the connecting tube 23 under normal conditions. When the user changes his posture and applies a large force to the lumbar support, the lumbar support will adaptively adjust its position.

[0050] Specifically, in this embodiment, a first mounting groove 230 is formed in the connecting tube 23, a second mounting groove 30 is formed in the movable seat 3, and the elastic member 4 is a compression spring, and the two ends of the compression spring are respectively placed in the first mounting groove 230 and the second mounting groove 30, and the two ends of the compression spring respectively abut and press against the bottom wall of the first mounting groove 230 and the bottom wall of the second mounting groove 30.

[0051] In some optional embodiments, a connecting frame 24 can be provided outside the connecting tube 23, and the connecting frame 24 is sleeved outside the connecting tube 23, and the inner wall of the connecting frame 24 can limit the connecting tube 23, and then limit the nut sleeve 22, so that the connecting tube 23 and the nut sleeve 22 can only move along the axial direction of the transmission screw 21 but cannot rotate. Another purpose of providing the connecting frame 24 is that in order to facilitate the start and stop control of the lumbar support drive motor 20, a first circuit board 240 for transmitting control signals is also required. By providing the connecting frame 24, the first circuit board 240 can be conveniently installed on the first connecting frame 24. The first connecting frame 24 can be fixedly installed on the mounting base 1 by screws or other connecting parts.

[0052] The waist support adjustment mechanism provided in this embodiment can be applied to waist support, combined with Figure 4 and Figure 5 As shown in , the lumbar support includes a lumbar support body 5, and the lumbar support adjustment mechanism is connected to the lumbar support body 5 through a movable seat 3. Specifically, the movable seat 3 is locked on the lumbar support body 5 by screws.

[0053] Combination Figure 6 As shown in , the lumbar support body 5 in this embodiment is formed with a concave cavity 50, and the lumbar support body 5 is provided with a through hole 51 on the bottom wall of the concave cavity 50, the movable seat 3 is located in the concave cavity 50 and fixedly arranged on the bottom wall of the concave cavity 50, the mounting seat 1 is located at the rear of the lumbar support body 5 and outside the concave cavity 50, and the lumbar support driving mechanism 2 is connected with the movable seat 3 through the through hole 51. The external structure described in the aforementioned "the connecting cylinder 23 is configured to be able to cooperate with the external structure to limit the rotation of the nut sleeve 22" is the inner ring wall of the through hole 51, and the inner ring wall of the through hole 51 can form a restriction on the aforementioned connecting frame 24, and then form a restriction on the connecting sleeve and the nut sleeve 22, so that the nut sleeve 22 and the connecting cylinder 23 can only move along the set direction but cannot rotate. Of course, in some optional embodiments, the connecting frame 24 may not be provided, and the inner wall of the through hole 51 may directly form a restriction on the connecting tube 23. Accordingly, the first circuit board 240 is arranged in other ways. For example, the first circuit board 240 and the lumbar support drive motor 20 may be arranged together in the mounting base 1.

[0054] The lumbar support in this embodiment includes a lumbar support body 5, an elastic cover (not shown in the figure), a massage assembly 6, a massage assembly drive mechanism 7 and a controller (not shown in the figure). Among them, the lumbar support body 5 is formed with a concave cavity 50, and the elastic cover is arranged on the lumbar support body 5 and cooperates with the concave cavity 50 to form an installation cavity. Specifically, the elastic cover can be a leather material with elasticity, or a cotton material with elasticity, or a mesh with elasticity, etc.; the elastic cover can also be a thicker elastic pad, such as a rubber pad or a sponge pad, and the above-mentioned leather material, cotton material, etc. can also be sewn on the outside of the rubber pad or the sponge pad. The elastic cover can be directly sewn at the opening of the concave cavity 50, so that the elastic cover directly covers the concave cavity 50 and cooperates with it to form an installation cavity. Alternatively, the elastic cover can also wrap the entire lumbar support body 5, and the part of the elastic cover that covers the concave cavity 50 cooperates with the concave cavity 50 to form an installation cavity. It is easy to understand that the above-mentioned shielding is not necessarily completely closed. As mentioned above, the elastic cover can be a mesh.

[0055] Combination Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown in , the massage assembly 6 and the massage assembly drive mechanism 7 are both arranged in the installation cavity, wherein the massage assembly 6 has an extended position and a retracted position relative to the lumbar support body 5, the massage assembly drive mechanism 7 is connected to the massage assembly 6, the controller is connected to the massage assembly drive mechanism 7, and the massage assembly drive mechanism 7 can be controlled to work (start-stop control) through the controller, and then the massage assembly 6 is driven by the massage assembly drive mechanism 7 to switch between the extended position and the retracted position. When the massage assembly 6 is in the extended position, the push action is applied to the elastic cover body, and when the massage assembly 6 is in the retracted position, there is a gap between the elastic cover body. It is easy to understand that when the massage assembly 6 is in the retracted position, there is a gap between the elastic cover body, that is, the massage assembly 6 does not apply pressure to the elastic cover body when it is in the retracted position. When the massage assembly 6 is in the extended position, it comes into contact with the elastic cover body, that is, when the massage assembly 6 is in the extended position, it applies pressure to the elastic cover body, causing the elastic cover body to deform. When the user observes from the outside, he will see that part of the elastic cover body is lifted up by the massage assembly 6.

[0056] The lumbar support provided in this embodiment forms an installation cavity on the lumbar support body 5, uses the installation cavity to assemble the massage assembly 6 and the massage assembly driving mechanism 7, and uses the massage assembly driving mechanism 7 to drive the lumbar support body 5 to switch between the retracted position and the extended position. In this way, when the user does not need massage, the massage assembly 6 can be retracted into the installation cavity without hurting the user's waist and back, thereby improving the user's comfort. When the user needs massage, the massage assembly 6 can be switched to the extended position to perform massage normally.

[0057] Furthermore, the lumbar support in this embodiment also includes a detection element disposed in the mounting cavity, and the controller is connected to the detection element and obtains the position information of the massage assembly 6 through the detection element. The controller controls the massage assembly drive motor 70 to work through the position information to drive the massage assembly 6 to switch from the retracted position to the extended position. By obtaining the position information of the massage assembly 6 through the detection element, it is possible to determine whether the massage assembly 6 is in the extended position, thereby facilitating the controller to start and stop the massage assembly drive mechanism 7. Specifically in this embodiment, the detection element includes an induction magnet (not shown in the figure) and a Hall sensor (not shown in the figure) adapted to the induction magnet. The induction magnet is configured to move synchronously with the massage assembly 6, and the position of the Hall sensor is configured to enable the induction magnet to sense the Hall sensor when the massage assembly 6 is in the extended position. The specific setting method of the induction magnet and the Hall sensor will be described later.

[0058] like Figure 6 and Figure 7 As shown in , the massage assembly drive mechanism 7 in this embodiment includes a massage assembly drive motor 70 and a transmission mechanism, the output shaft of the massage assembly drive motor 70 is provided with a threaded screw segment 700, the transmission mechanism includes a connecting block 71 fixedly arranged on the lumbar support body 5, a threaded sleeve 710 adapted to the threaded screw segment 700 is arranged in the connecting block 71, the threaded screw segment 700 is inserted into the threaded sleeve 710 in the connecting block 71 and the two are threadedly matched, the body of the massage assembly drive motor 70 and the massage assembly 6 are relatively fixedly arranged and the two move synchronously. That is, when the massage assembly drive motor 70 is working, the output shaft of the massage assembly drive motor 70 rotates, and the threaded screw segment 700 rotates accordingly. Since the threaded screw segment 700 is threadedly matched with the connecting block 71, and the connecting block 71 is fixedly arranged on the lumbar support body 5, the threaded screw segment 700 will move axially while rotating. In this way, the threaded screw segment 700 will synchronously drive the body of the massage assembly driving motor 70 and the massage assembly 6 fixedly arranged relative to the body of the massage assembly driving motor 70 to move together.

[0059] It is easy to understand that in other optional embodiments, the linear drive can be directly selected as the massage assembly drive mechanism 7, and the massage assembly 6 can be directly driven to move by the output shaft of the linear drive, so that the massage assembly 6 can be switched between the extended position and the retracted position. Alternatively, in an optional embodiment, the massage assembly drive mechanism 7 still includes the massage assembly drive motor 70 and the transmission mechanism in this embodiment, but the massage assembly drive motor 70 is fixedly installed on the lumbar support body 5, and the connecting block 71 is fixedly installed with the massage assembly 6 (the connecting block 71 is movably arranged relative to the lumbar support body 5), so that when the massage assembly drive motor 70 is working, the threaded screw segment 700 can cooperate with the connecting block 71 to drive the connecting block 71 to drive the massage assembly 6 to move, and the massage assembly 6 can be switched between the extended position and the retracted position. However, the design of the massage assembly drive mechanism 7 provided in this embodiment has the following advantages: for the seat product, affected by the design of the volume size, when the massage assembly drive mechanism 7 is arranged in the lumbar support body 5, its design size needs to be reduced as much as possible. When a linear drive is directly selected as the massage assembly drive mechanism 7 or the massage assembly drive motor 70 in the massage assembly drive mechanism 7 is fixedly designed, a large protrusion needs to be formed at the rear of the lumbar support body 5 so that the linear drive or the massage assembly drive motor 70 that needs to be fixedly set can be installed. When the design of the massage assembly drive mechanism 7 in this embodiment is adopted, since the connection block 71 only needs to form a threaded hole that is compatible with the threaded screw segment 700, its size can be smaller. The massage assembly drive motor 70 that is movably set relative to the lumbar support body 5 can make full use of the space in the concave cavity 50 of the lumbar support body 5. In this way, the design size can be reduced as much as possible for the rear position of the lumbar support body 5, which is convenient for its application to the seat.

[0060] Combination Fig. 9 and Fig.11 As shown in the figure, in this embodiment, the massage assembly driving motor 70 is designed so that when it rotates forward, the body of the massage assembly driving motor 70, the massage assembly 6 and the slide 8 are all moved forward, so that the massage assembly 6 reaches the extended position; when the massage assembly driving motor 70 is reversed, the body of the massage assembly driving motor 70, the massage assembly 6 and the slide 8 are all moved backward, so that the massage assembly 6 reaches the retracted position.

[0061] like Figure 6 , Figure 7 and Figure 8 As shown in the figure, the waist support in this embodiment also includes a slide seat 8 slidably arranged on the movable seat 3, and the massage assembly drive motor 70 and the massage assembly 6 are fixedly arranged on the slide seat 8. In this way, when the massage assembly drive motor 70 is working, the body of the massage assembly drive motor 70, the massage assembly 6 and the slide seat 8 can all slide relative to the movable seat 3.

[0062] Furthermore, in this embodiment, a slide groove 31 is formed on the movable seat 3, and a slider portion 800 adapted to the slide groove 31 is formed on the slide seat 8. The slider portion 800 is formed with a second positioning groove 801, and the body of the massage assembly drive motor 70 is positioned in the second positioning groove 801. Through the above design, the sliding stability of the body of the massage assembly drive motor 70, the massage assembly 6, and the slide seat 8 can be further increased. Furthermore, a guide rail 32 can be provided on the side wall of the slide groove 31, and the guide rail 32 can be used to increase the stability of the slide seat 8 during the sliding process.

[0063] Specifically, the slide seat 8 in this embodiment includes a main seat 80 fixedly mounted on the movable seat 3 and a cover 81 fixedly connected to the main seat 80. The cover 81 is fastened to the main seat 80 by screw threads. Of course, the cover 81 can also be snapped to the main seat 80 by a snap-fit ​​structure. A third positioning groove 810 is formed between the cover 81 and the main seat 80. The massage assembly 6 includes a shell 60, and the shell 60 has a snap-fit ​​section 61 adapted to the third positioning groove 810. The massage assembly 6 is fixed to the slide seat 8 by snapping the snap-fit ​​section 61 into the third positioning groove 810. The aforementioned slider portion 800 is formed on the main seat 80, and the massage assembly drive motor 70 is placed in the second positioning groove 801 formed on the slider portion 800. At the same time, the outer shell of the massage assembly drive motor 70 is locked and fixed to the slider portion 800 by screws.

[0064] The slide groove 31 formed on the movable seat 3 has a bottom wall and side walls on both sides of the bottom wall, and the side walls on both sides are provided with the aforementioned guide rails 32. The aforementioned detection element is arranged between one side wall of the slide groove 31 and the slider portion 800. Specifically, the induction magnet in the detection element is arranged on the slider portion 800, and the Hall sensor in the detection element is arranged on a second circuit board 320, and the second circuit board 320 is fixed and locked on the guide rail 32 on one side wall of the slide groove 31 by screws. The Hall sensor is electrically connected to the controller through the second circuit board 320.

[0065] The massage assembly 6 in this embodiment also includes a massage head 62 arranged on the housing 60, and the controller is electrically connected to the massage head 62 and can control the operation of the massage head 62. Specifically, there are two massage heads 62, and the two massage heads 62 are symmetrically distributed on both sides of the clamping section 61. It should be noted that the controller in this embodiment can control the operation of the massage assembly drive mechanism 7 as well as the operation of the massage assembly 6. In some optional embodiments, different controllers can also be set to control the operation of the massage assembly drive mechanism 7 and the massage assembly 6 respectively, and it is only necessary to electrically connect the different controllers to transmit control signals. Alternatively, the controller can also be used as a controller for the entire seat, that is, the seat may be designed with more functions, such as seat cushion heating, cooling and other functions, and a controller is set for the entire seat. While being able to be used to control the aforementioned massage assembly drive mechanism 7 and massage assembly 6, the controller can also control the operation of other functional modules of the seat such as heating and cooling.

[0066] like Fig.13 As shown in , the lumbar support adjustment mechanism provided in this embodiment can also be directly used only for a seat, which includes a seat back 9 and a lumbar support arranged on the seat back 9, and the lumbar support adjustment mechanism is arranged between the seat back 9 and the lumbar support. The lumbar support can be a common lumbar support with only a lumbar support function, or it can be the lumbar support with a massage function as described above in this embodiment.

[0067] Finally, it should be noted that the above-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A lumbar support adjustment mechanism for a seat, characterized in that: include: A mounting seat, which is used to connect with the backrest of the seat; A lumbar support driving mechanism, which is arranged on the mounting seat; as well as, A movable seat, which is used to be fixedly connected to the waist support; Wherein, the lumbar support driving mechanism includes a lumbar support driving motor and a screw-nut transmission mechanism, and the lumbar support driving motor is connected to the movable seat through the screw-nut transmission mechanism and drives the movable seat to reciprocate along a set direction.

2. The lumbar support adjustment mechanism according to claim 1, characterized in that: The screw-nut transmission mechanism comprises a transmission screw, a nut sleeve and a connecting tube, wherein the transmission screw is connected to the output shaft of the waist support driving motor and is driven to rotate by the waist support driving motor, and the nut sleeve is sleeved outside the transmission screw and the two are threadedly matched; The connecting tube is sleeved outside the nut sleeve and the two are fixedly connected. The connecting tube is configured to cooperate with the external structure to limit the rotation of the nut sleeve, and the connecting tube is connected to the movable seat.

3. The lumbar support adjustment mechanism according to claim 2, characterized in that: The waist support driving motor is arranged perpendicular to the set direction, the output shaft of the waist support driving motor is fixedly provided with a driving bevel gear, the transmission screw is fixedly provided with a transmission bevel gear, and the driving bevel gear is meshed with the transmission bevel gear for transmission.

4. The lumbar support adjustment mechanism according to claim 2, characterized in that: The connecting tube and the movable seat are movably connected via a connecting shaft that runs through the two in a horizontal direction, and the axial direction of the connecting shaft is perpendicular to the set direction; The waist support adjustment mechanism also includes an elastic member arranged between the connecting tube and the movable seat, and two ends of the elastic member apply pressure to the connecting tube and the movable seat respectively.

5. The lumbar support adjustment mechanism according to claim 4, characterized in that: The connecting tube forms a first mounting groove, the movable seat forms a second mounting groove, the elastic member is a compression spring, the two ends of the compression spring are respectively placed in the first mounting groove and the second mounting groove, and the two ends of the compression spring respectively abut and press against the bottom wall of the first mounting groove and the bottom wall of the second mounting groove.

6. Lumbar support, characterized in that: The invention comprises a lumbar support body and a lumbar support adjustment mechanism as claimed in any one of claims 1 to 5, wherein the lumbar support adjustment mechanism is connected to the lumbar support body via a movable seat.

7. The lumbar support according to claim 6, characterized in that: The lumbar support body is formed with a concave cavity, and a through hole is provided on the bottom wall of the concave cavity. The movable seat is located in the concave cavity and fixedly arranged on the bottom wall of the concave cavity. The mounting seat is located at the rear of the lumbar support body and outside the concave cavity. The lumbar support driving mechanism is connected with the movable seat through the through hole.

8. The lumbar support according to claim 7, characterized in that: The waist support also includes: An elastic cover body, which is arranged on the waist support body and cooperates with the concave cavity to form a mounting cavity; A massage assembly, which is disposed in the mounting cavity and has an extended position and a retracted position relative to the lumbar support body; a massage assembly driving mechanism, which is disposed in the mounting cavity and connected to the massage assembly; and a controller connected to the massage assembly drive mechanism and used to control the massage assembly drive mechanism to operate so as to drive the massage assembly to switch between the extended position and the retracted position; Wherein, when the massage assembly is in the extended position, it pushes on the elastic cover body, and when the massage assembly is in the retracted position, there is a gap between the massage assembly and the elastic cover body.

9. The lumbar support according to claim 8, characterized in that: The waist support also includes a sliding seat arranged in the installation cavity, the sliding seat is slidably arranged on the movable seat, and the massage assembly is fixedly arranged on the sliding seat.

10. The lumbar support according to claim 9, characterized in that: The massage assembly driving mechanism includes a massage assembly driving motor and a connecting block fixedly arranged on the lumbar support body, the output shaft of the massage assembly driving motor is provided with a threaded screw segment, the connecting block is provided with an internal thread matched with the threaded screw segment, the threaded screw segment is inserted into the connecting block and the two are threadedly matched, and the body of the massage assembly driving motor is fixedly arranged on the slide seat.

11. The lumbar support according to any one of claims 8 to 10, characterized in that: The lumbar support also includes a detection element arranged in the installation cavity. The controller is connected to the detection element and obtains position information of the massage assembly through the detection element. The controller controls the massage assembly drive motor to operate according to the position information to drive the massage assembly to switch from the retracted position to the extended position.

12. A seat, characterized in that: The seat comprises a lumbar support adjustment mechanism as claimed in any one of claims 1 to 5; Alternatively, the seat comprises a lumbar support as claimed in any one of claims 6 to 11.

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